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Important: Ensure that the gearbox cover has had the modification to allow for adding gear oil. Inspect the cover for a reference mark (1) (shallow drilled indent) on the gearbox boss. Across from this mark should be a brake rotor bolt threaded hole with a hole drilled through the cover. If this modification has not been performed refer to Gearbox Modification.

Check wheel rim if there is no oil residue / spill. If you find - replace gearbox o-ring.

Locate the reference mark (1) on the gearbox cover boss.

Rotate the wheel so that the reference mark is at the top and remove the brake rotor bolt (2) that is across from the mark.

Place suitable container under the gearbox. Rotate the wheel so that the drain hole is at the bottom. Let the oil drain.

Pour the gear oil into the gearbox through this brake rotor bolt hole (1).Important: Do not spill any of the oil on to the brake rotor or braking components. If it happens use brake cleaner spray (generously) to clean disc and pads.

Apply threadlock (Loctite Blue) to the threaded portion of the brake rotor bolt.

Tighten the rotor bolt to 20 N•m (15 lb ft)

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